BlockHeader

sochdb_core::block_storage

Struct BlockHeader 

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pub struct BlockHeader {
    pub magic: [u8; 4],
    pub compression: u8,
    pub original_size: u32,
    pub compressed_size: u32,
    pub checksum: u32,
}
Expand description

Block header in payload store (Task 1: Fixed 17-byte layout)

Layout (all integers little-endian):

Offset  Size  Field            
0       4     magic = "TBLK"   
4       1     compression      
5       4     original_size    
9       4     compressed_size  
13      4     checksum (CRC32)
Total: 17 bytes

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§magic: [u8; 4]

Magic bytes

§compression: u8

Compression type

§original_size: u32

Original size

§compressed_size: u32

Compressed size

§checksum: u32

CRC32 checksum

Implementations§

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impl BlockHeader

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pub const MAGIC: [u8; 4]

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pub const SIZE: usize = 17

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pub fn to_bytes(&self) -> [u8; 17]

Serialize to fixed 17-byte layout (Task 1: deterministic serialization)

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pub fn from_bytes(buf: &[u8]) -> Result<Self>

Deserialize from 17-byte buffer (Task 1: validates magic)

Trait Implementations§

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impl Clone for BlockHeader

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fn clone(&self) -> BlockHeader

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for BlockHeader

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.